Acutec 35 Gas Detection

8/17/2019 Acutec 35 Gas Detection

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ACUTEC ™ 35GAS DETECTION

SYSTEMBOOK NO. WT.050.130.000.UA.IM.1108


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ACUTEC™ 35 SYSTEM

Introd.

INTRODUCTION

The Sieme ns Wate r Tech no log ies Series 50-130 Acute c™ 35 Ga s Detec-tion system is an on-line m onitoring system for the detection o f chlorine(Cl2), sulfur dioxide (SO 2), or amm onia (NH 3) ga s in am bient air. Alarm

cont acts a re provided to transfer a t user selecta ble setpoints. Monitormod ules provide a d igita l rea dout of g as level and a 4-20 mA output.Single or Dual Units are availab le, using any co mbinat ion of g as det ec-tors and m onitors or alarm units.

One Receiver Module is conn ecte d to e ach ga s Sensor/Tran smitte r with atw o-conductor cable, and provides information on the g as concent rationin the sen sor area . Receivers are pow ered by th e Pow er Supply Modulesupplied w ith the Ga s Detector system.

The Series 50-130 Sen sor/Transmitte r con sists of an electroch em ical ga ssensor and an electronic amplifier that transmits a gas concentrationsign al to a Receiver Module loca ted in t he Cont rol Unit. An o ptiona l ga sgenerator may be ordered which enables the Receiver to automaticallytest th e senso r every 24 hours.

NOTE: When ordering material always specify model and serial num-ber of apparatus.

Table Of Contents

Very Importa nt Safety Precautions ........ ..... ..... .... .... SP-1,-2Regional Offices ........................ ................. ............ 1.010-1Technical Data ..................... ................. .................. Section 1Installation .................. ................. ................. ......... Section 2Operation ................. ................. .................. ........... Section 3Service .................. ................. ................. ............... Section 4Parts Illustrations ................. ................. ................. . Section 5Spare Parts List ............................... ................. ....... Section 6


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VERY IMPORTANT SAFETY PRECAUTIONS

This page titled “Very Important Sa fety Precaut ions” provides, in brief, info rmation o f urgen t importa ncerelative to safety in the installation, o peration, a nd m aintenance of th is equipment.

WARNING

TO AVOID POSSIBLE SEVERE PERSONAL INJURY AND EQUIPMENTDAMAGE, OBSERVE THE FOLLOWINGPRECAUTIONS:

GASES DETECTED ARE HAZARDOUS SUBSTANCES, AND IF BREATHED IN HIGH CONCENTRATIONS CANCAUSE DEATH. THE OPERATION OF THIS DETECTOR MUSTBE CHECKED AND VERIFIED FREQUENTLY ONA REGULAR SCHEDULE.

TO AVOID INJURY FROM ELECTRICAL SHOCK, TURN POWER SOURCES OFF BEFORE SERVICING EQUIPMENT.

TO AVOID POSSIBLE SEVERE PERSONAL INJURY OR DAMAGE TO EQUIPMENT, THIS PRODUCT SHOULDONLY BE USED WITH POWER SUPPLIES THATHAVE A SINGLE HOTWIRE WITH RESPECTTO EARTH. THEWIRE CONNECTED TO POWER SUPPLY TERMINAL “N” MUSTBE NEUTRAL. POWER AND EARTH GROUNDMUSTBE PROPERLY CONNECTED AS SHOWN.

THE GENERAL SENSOR RESPONSE TEST, AS DESCRIBED IN THIS MANUAL, MUSTBE PERFORMED WHEN-EVER A NEW SENSOR IS INSTALLED.

AFTER ANY MAINTENANCE THE DETECTOR SHOULD BE TESTED FOR RESPONSE TO ASSURE NORMALOPERATION.

REPLACE SENSOR IMMEDIATELY IF SENSOR FAILS GAS TEST.

HANDLE BATTERIES WITH CARE, BEING CERTAIN NOT TO SHORTTERMINALS, AS SEVERE ARCING OREXPLOSION COULD OCCUR.

TO ENSURE PROPER AND SAFE OPERATION OF THIS EQUIPMENT, USE ONLY SIEMENS WATER TECH-NOLOGIES LISTED PARTS EXCEPT COMMERCIALLY AVAILABLE PARTS AS IDENTIFIED BY COMPLETEDESCRIPTION ON PARTS LIST. THE USE OF UNLISTED PARTS CAN RESULTIN EQUIPMENT MALFUNC-TIONS CAUSING POSSIBLE SEVERE PERSONAL INJURY.

THIS EQUIPMENT SHOULD BE INSTALLED, OPERATED AND SERVICED ONLY BY TRAINED, QUALIFIEDPERSONNEL WHO ARE THOROUGHLY FAMILIAR WITH THE ENTIRE CONTENTS OF THIS INSTRUCTIONBOOK.


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VERY IMPORTANT SAFETY PRECAUTIONS (CONT’D)

DO NOT DISCARD THIS INSTRUCTION BOOK UPON COMPLETION OF INSTALLATION. INFORMATIONPROVIDED IS ESSENTIAL TO PROPER AND SAFE OPERATION AND MAINTENANCE.

ADDITIONAL OR REPLACEMENTCOPIES OF THIS INSTRUCTION BOOK ARE AVAILABLE FROM:

Sieme ns Wate r Tech no log ies Corp.1901 West G arden Roa dVinelan d, New Jersey 08360Phone: (856) 507-9000Fax: (856) 507-4125

NOTE

Minor pa rt num ber cha ng es ma y be incorporate d into Sieme ns Wate r Techno logies products from t imeto t ime t hat are not immediately reflected in the instruction book. If such a chang e a pparently has be enma de in your equipment a nd do es not appear to be reflected in your instruction b ook, contact yourloca l Siemens Water Techno log ies sales of fice for informa tion .

Plea se include th e eq uipmen t serial number in a ll correspond ence. It is essential for effective commu-nication and proper equipment identification.


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ACUTEC™ 35 SYSTEM

REGIONAL OFFICES

INSTALLATION, OPERATION, MAINTENANCE, AND SERVICE INFORMATION

Direct any q uestions concerning this equipment tha t a re not a nsw ered in th e instruction b ook to theReseller from whom the equipment was purchased. If the equipment was purchased directly fromSieme ns Wate r Techno logies Corp., Vinelan d, NJ, cont ac t the off ice indicate d below .

UNITED STATES

1901 West Garden Roa dVineland , NJ 08360TEL: (856) 507-900 0FAX: (856) 507-4125

CANADAIf th e eq uipment w as purchased directly from Siemens Wate r Techno logies Can ad a, Inc., cont act thenearest of fice indicated below.

ONTARIO QUEBEC

250 Royal Crest Court 243 Blvd. BrienMarkha m, Onta rio Burea u 210L3R3S1 Repe nt igny, Queb ec(905) 944 -2800 (450) 582-4266

1.010-1


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1

SECTION 1 – TECHNICAL DATA

List Of Contents

PARA./DWG. NO.

Technical Data ......... .................. ................. ............ 1.1Interferences ................. ................. .................. ...... 1.2


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1.1 Technical Data

Gas Ranges

Gas Standard

Range

Minimum

Range

Maximum

RangeChlorine 0 - 10 ppm 0 - 5 ppm 0 - 50 ppmSulfur Dioxide 0 - 20 ppm 0 - 10 ppm 0 - 100 ppmAmmonia 0 - 100 ppm 0 - 50 ppm 0 - 500 ppmGas sensors are shipped factory set to stand ard ranges, but m ay becalibrated to other rang es as show n.

Setpoints Adjustable, 5 - 100%of Range

Enclosure Ra tings NEMA 4X (except battery enclosure)

Distance, Transmitter to Receiver 1000 ft. (maximum)

Opera ting Tempera ture 0 to 105 °F, continuous-10 to 120 ° C, intermittent

Humidity 0 - 99%, non-condensing

Pow er 85 - 255 VAC, 50/60 Hz, 15 W

Contacts Ala rm (configurable): 3 SPDT

Trouble : 1 SPDTPow er Fa ilure: 1 SPDT

Contact Rating 10 A a t 120 VAC, 5 A a t 250 VAC,Resistive

Ba t te ry Back-up (opt ional) 12 V, 4 A/h r, 6 Hrs min imum

An alo g Out put (o pt io na l) 4-20 m A, Iso la te d, 1000 o hm smaximum

Sensor Life 2 years (maximum)

Gas Genera tor Life 1 year

NOTE: The Auto-Test option is for indoor use only, and should onlybe used with detectors set to the standard range or lower, as shownin the GAS RANGES table. If used with higher ranges, the generatormay not produce enough gas to test the sensor.


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1.2 Interferences

Electrochemical sensors are, by nature, not 100%selective; therefore,they ca n exhibit response to oth er gases present in ambient a ir.

The fo llow ing ta bles list th e possible interferences tha t ma y occur wh enusing the different g as sen sors. The t ab les indicate the relat ive responseof the sensor to 1 ppm of the listed gas, expressed in terms of relativeppm sign al. For example: exposure of a chlorine sen sor to a ga s samplecont aining 1 ppm o f nitrogen dioxide (NO 2) wo uld produce a signa l equalto 0.4 ppm of chlorine. A neg at ive sign (-) indicates an interference tha tcan ca use low ga s measurements if there is a mixture of the me asuredgas and a nother gas.

CHLORINEInterference Gas Response

Bromine 1.0Fluorine 1.0Chlorine Dioxide 1.0Ozone 1.0Nitrogen Dioxide 0.4Hydrogen Sulfide -0.1Hydrogen Cyanide -0.05Methyl Mercaptan -0.04Sulfur Dioxide -0.01

SULFUR DIOXIDEInterference Gas ResponseNitrogen Dioxide 0.8Hydrogen Cyanide 0.15Nitric Oxide 0.04Acetylene 0.02Ethanol 0.05Hydrogen 0.005Bromine -0.1Fluorine -0.1Chlorine Dioxide -0.1Ozone -0.1


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AMMONIAInterference Gas ResponseMethyl Mercaptan 7Hydrogen Sulfide 2

Hydrogen 0.1Nitrogen Dioxide -0.2Chlorine -0.2


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SECTION 2 – INSTALLATION

List Of Contents

PARA./DWG. NO.

Overview .................. ................. ................. ............ 2.1General Installation ................ ................. ............... 2.2Mounting Pow er Supply an d Receiver Modules .... .... 2.3Electrical Connections .................. .................. ......... 2.4Installation o f Pow er Supply Module ........... ............ 2.5Illustrations Dimensions Single Point Detection System ................. ............. 50.130.100.001 Dual Point Detection System ................. ............... 50.130.100.002 Sensor/Transmitter .... ..... ..... .... ..... .... ..... ..... .... ..... . 50.130.100.003

Battery Back-up............................ ................. ....... 50.130.100.004 Insta llation Wiring Single Point Detection System ................. .......... 50.130.130.001 Dual Point Detection System ................. ............ 50.130.130.002


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2.1 Overview

The Series 50-130 Ga s Detection System consists o f mo dular com -ponents t hat can b e used in a variety of configurations to f i t specificapplication requirements. Following is a brief description of the

major system componen ts. More detailed informat ion follow s laterin th is manua l.

• BASE UNIT: Includ es a Pow er Supply Module housed in a NEMA 4Xenclosure. Sing le-Point Units accepts one Receiver Module, an d Dual-Point Units accept tw o Rece iver Modules. All units a re provided w ithan audible ho rn.

• POWER SUPPLY MODULE: Provide s pow er for one o r tw o Rece iverModules, for the audible horn, and for charging an external BatteryBack-up. The pow er supply accepts 85 to 255 vo lts, a c (50/60 Hz)

an d mo unts o n a DIN rail.• DETECTOR RECEIVER MODULE: Receives a signa l from a one Se nsor/

Transmitter, can b e set for tw o a larm levels and provides three a larmcon ta cts. The Rece iver Mod ule moun ts on a st an da rd DIN rail. Re-ceiver Mod ules include a Reset /Acknow ledg e but ton, provide pow erfor Sensor/Transmitte rs, and con trol Autotest Gen erat ors.

• MONITOR RECEIVER MODULE: Same as th e Detecto r Module, but alsoincludes a digital display o f g as level and a 4-20 mA output.

• SENSOR/TRANSMITTER: Consists of an electroche mical gas sensor con-

necte d to a NEMA 4X transm itter, w hich sends a sign al to a ReceiverModule.

• AUTOTEST GENERATOR: An elect roche mica l gas g en era to r w hichat ta ches to Sensor/Transmitters a nd auto ma tically t ests sen sorresponse d aily.

NOTE: The Auto-Test option is for indoor use only, and should onlybe used with detectors set to the standard range or lower, as shownin Section 1.1 – Technical Data. If used with higher ranges, the gen-erator may not produce enough gas to test the sensor.

• BATTERY BACK-UP: The Ba tt ery Back-up option fo r gas de tect ion sys-tems consists of a separate w all-mounted enclosure w hich ho uses aba ttery a nd a cont rol circuit boa rd. The ba ttery is a sea led, lea d-acidtype a nd is rated fo ur ampere-hours.


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2.2 General Installation

NOTE: Power supply or Receiver modules may be shipped with pro-tective transparent plastic covers. These covers should be peeledoff and discarded.

System enc losures, Bat tery Back-up units, and Senso r/Transmitte rs areall designed fo r surface mo unting using screws or bolts inserted th roughthe recessed mounting h oles at ea ch corner of the enclosures. Mountinghole dimensions a re show n o n th e a ppropriate diagram. Included w itheach system enclosure are mount ing hole templates w hich can be usedto mark hole centers on walls or mounting panels. Mounting recessesare suitab le for #8 ma chine screw s or w ood screw s.

Refer to pa ragra ph 3.4.1, Senso r Insta llat ion, for specific informa tion onlocating ga s sensors.

Enclosures a re supplied w ith cond uit hub s an d sea l rings for w ate r-tightconn ection o f 1/2” NPTthreade d con duit. Plast ic cable gland s ma y alsobe purchased to connect cab les w ithout con duit.

Inst all the 1 /2” cond uit hubs in a ny en closure kno ckout labeled PG16.Note tha t some knockouts have more tha n one designa tion, such asPG11/16. Tho se w ith tw o d esign at ions w ill have co ncen tric circlesfor kno ckout s. The inner circle ma rks the low er PG numb er w hile theoute r circle marks the h ighe r number. Place a t hin blade d screw driverinto th e circular slot o r the de sired knockout size a nd t ap firmly w ith aha mmer (see Figure 2.1). Place the sea l over the h ub thread s on t he

outside of the enclosure and a tta ch the hub w ith the supplied nut.

Figure 2.1

The Acutec™ unit sh ould not be exposed to direct sunligh t. Continuousam bient tem perature should not exceed 105 ° F. When this temperatureis likely to be a pproa ched, it is recom men ded t ha t relays be used in thenon -energized mo de, a nd th e display be set to n orma l intensity (MonitorUnits o nly). See Section 3 fo r deta ils.


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2.3 Mounting Power Supply and Receiver Modules (See Dwg. 50.130.000.001)

Pow er Supply an d Receiver Modules are mounte d to a sta nda rd 35 x 7.5mm DIN rail in th e de tect ion syste m en closure. The spring loaded clipw ith the loop ho lds the m odule to the rail. To insta ll mo dules, first slide

the b otto m of t he mo dule under the rail. Then pull the loo p out w ith asma ll screw driver wh ile low ering the top of the mod ule onto the rail. Toremove mo dules, reverse th is procedure.

2.4 Electrical Connections (See Dwgs. 50.130.130.001 And 50.130.130.002)

Field wiring required for the Detection System includes connection ofac pow er, conne ction of tw o-conductor cable betw een t he Receiver andthe Senso r/Tran smitte r, con nec tion o f the Bat tery Back-up unit (whenpurchase d), an d con nection of t he a udible ho rn to Receiver Modules. A25-foo t leng th o f tw o-con ducto r cable is supplied fo r each Senso r/Trans-

mitter. Long er leng ths of up to 1000 feet ma y be used w hen req uired.

The a c input pow er is conne cted to t he low er left o f the Pow er Module,as show n in t he Insta llat ion Wiring d raw ings. A ground terminal is pro-vided on the mounting track for connection of earth ground. For safeoperation and to avoid noise interference, it is important that earthground be con nected to this terminal first, and th en to th e pow er inputearth g round termina l on th e Pow er Supply Module, as show n.

WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY OR DAM-AGE TO EQUIPMENT, THIS PRODUCT SHOULD ONLY BE USED WITHPOWER SUPPLIES THAT HAVE A SINGLE HOT WIRE WITH RESPECT TOEARTH. THE WIRE CONNECTED TO POWER SUPPLY TERMINAL “N”MUST BE NEUTRAL. POWER AND EARTH GROUND MUST BE PROPERLYCONNECTED AS SHOWN.

NOTE: Field wiring must conform to local electrical codes.

The w iring d raw ings show interna l w iring o f the systems. Sen sor/Trans-mitter connections a re show n in pa ragraph 3.4.1, Sensor Installation.

All terminal blocks are plug-in type, a nd ca n b e unplugg ed a llow ing re-place men t of mo dules witho ut removing individua l w ires.

Electrical connection is made between the Battery Back-up unit andthe Pow er Supply Module. The circuit bo ard mo unted on t he b at teryconta ins a tw o-position plug-in terminal block ma rked plus a nd minus.The plus termina l is conn ected t o terminal B+ of t he pow er supply andthe minus termina l is conn ected to B- of t he pow er supply.

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2.5 Installation of Power Supply Module

The Pow er Supply Module used in th e g as d etection system operate son a c supplies of 85 volts to 255 vo lts, a t 50/60 Hz. No a djustme nt s ormod ificat ions are required o f the user.


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NOTE: ( ) INDICATES DIMENSIONS IN MILLIMETERS.

SINGLE POINT DETECTION SYSTEM - DIMENSIONS

50.130.100.001ISSUE 3 8-08

7-3/16”(183)

6-9/16”(167)

4-5/16”(110)

7-1/16”(179)

6-1/2”(165)

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DUAL POINT DETECTION SYSTEM - DIMENSIONS

50.130.100.002ISSUE 3 8-08

9-7/16”(240)

10”(254)

4-3/8”(111)

7-1/16”(179)

6-1/2”(165)

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A ACCESSORY ITEM FURNISHED ONLY IF SPECIFICALLY LISTED IN QUOTATION.

WHEN THE GAS GENERATOR IS USED, THE UNIT MUST BE MOUNTED AS SHOWN.

SENSOR/TRANSMITTER - DIMENSIONSWith Generator

50.130.100.003ISSUE 2 7-98

3-3/4”(95)

3-1/8”(79)

3-3/4”(95)

1-1/8”(29)

1-1/16”(27)

3-1/8”(79)

2-5/8”(67)

1-3/8”(35)

3/4”(19)

2-1/4”(57)


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BATTERY BACK-UP - DIMENSIONS

50.130.100.004ISSUE 2 7-98

4-3/8”(111)

3-3/4”(95)

3-1/2”(89)

7-1/8”(181)

6-1/2”(165)


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SINGLE POINT DETECTION SYSTEM - INSTALLATION WIRING

50.130.130.001ISSUE 2 11-08

NOTE: WIRING BY SIEMENS WATER TECHNOLOGIES. FIELD WIRING MUSTCONFIRM TO LOCAL ELECTRICAL CODES.


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DUAL POINT DETECTION SYSTEM - INSTALLATION WIRING

50.130.130.002ISSUE 2 11-08

NOTE: WIRING BY SIEMENS WATER TECHNOLOGIES. FIELD WIRING MUSTCONFIRM TO LOCAL ELECTRICAL CODES.


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SECTION 3 – OPERATION

List Of Contents

PARA./DWG. NO.

Power Supply Operation ............................. ............ 3.1Receiver Module Operation ................ ................. .... 3.2 Configuration Switches ................. ................. ...... 3.2.1 Rang e Selection ............... .................. ................. . 3.2.2 Setpoint Selection ............... .................. ............... 3.2.3 Relay Configuration ................ ................. ............ 3.2.4 Alarm Delay ............... .................. ................. ....... 3.2.5 Display Intensity ................. .................. ............... 3.2.6 Auto-Test Enable ............... .................. ................. 3.2.7Receiver Module Startup .................. ................. ...... 3.3

Alarm Acknow ledge and Reset ................ ............. 3.3.1 Sensor Trouble Alarm an d Relays ..... ..... ..... .... ..... .. 3.3.2 Auto-Test Function ............... ................. ............... 3.3.3 Lamp and Horn Test ............... .................. ............ 3.3.4 Relay Inhibit ................ .................. ................. ...... 3.3.5 Manua l Auto-Test ................. .................. .............. 3.3.6 Remote Reset ................. .................. ................. ... 3.3.7 Analog Output ............... ................. .................. ... 3.3.8Sensor Transmitter Operation ............... .................. 3.4 Sensor Installation .................. ................. ............ 3.4.1 Senso r Loca tion (Chlorine , Sulfur Dioxide,

and Ammon ia) .................. ................. ............... 3.4.2

Battery Back-Up Operation ................. .................. ... 3.5Illustrations Assembly – Gas Detector System ................ .......... 50.130.160.001


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3.1 Power Supply Operation (See Dwg. 50.130.000.001)

The po w er supply provides a regula ted 13.7 Vdc to Rece iver Modules an dto the Battery Back-up through three sets of terminals at the top of themod ule. Tota l output current is rate d a t on e a mp.

The pow er supply provides a SPDTrelay cont act w hich de-energizes w henac pow er is lost.

3.2 Receiver Module Operation

Receiver Modules provide the follow ing fea tures:

• LED powe r on indicator w ith gas symbol designa tion.• LED ind ica to r lamps fo r WARNING and ALARM.• Three SPDTalarm relays, switch prog ramm ab le to operate on Warn-

ing or Alarm level, for latching o r non-latching o peration, a nd to bema intained norma lly energized or normally de-ene rgized. In addition,Alarm Relay 3 ma y be con figured to co ntrol an externa l horn.

• LED indica to r lam p fo r SENSOR TROUBLE cond ition .• One SPDTTroub le Relay, for rem otely indica ting a SENSOR TROUBLE

condition.• Isolated remote reset input terminals for remote alarm acknow l-

edgement .• Supplies pow er for opera tion of a Senso r/Tran smitte r up to 1000

feet awa y.• Controls the Autotest Gas Generator.

In a ddition, Monitor type Receivers provide t he follow ing fun ctions:

• LED digital display of ga s concen tration in ppm.• Isolated 4-20 mA output signa l proportiona l to ga s conce ntrat ion.

3.2.1 Configuration Switches

Receivers for different gases are identical except for the gas symbol at-tached to the green power LED. Operating range, setpoints, relay con-figura tion , display inte nsity, ala rm delay, and Auto -Test a ctivat ion a reselectable using fo ur ba nks of DIP sw itches loca ted on t he con figurationcircuit board inside the Receiver module.

The con figuration sw itches can be a djusted a s follow s:

CAUTION: To protect internal components from possible damage,this procedure should be performed in a static free environment.

a. Remo ve all pow er from the ga s detecto r unit.

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b. Unplug the termina l connecto rs on the top an d bottom of the receivermodule. Refer to Figure 3.1.

c. Remove the receiver module from th e enclosure by pulling out theplastic clip at the to p of the m odule w hile removing the m odule from

the rail in the ba ck of t he e nclosure.

d. Turn the receiver mo dule over. There are four plastic tabs on th e ba ckside of the unit. Gently spread the plastic tabs out and lift the backpane l off t he receiver, being ca reful not to b reak the t ab s.

e. Gent ly push up on th e terminal conn ectors. This w ill allow th e elec-tronic assembly to be lifted o ut of the h ousing.

Figure 3.1 - Front and Back Views of Receiver Module


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f. Position the electronic assembly as show n in Figure 3.2. Ident ifyDIP SWITCH BANKS A throug h D.

Figure 3.2 - Top View of Module Electronics Without Housing

g. Adjust the Receiver DIP sw itch functions as need ed, by referring tothe Figure 3. 3.

Switches can be set using the t ip of a ball point pen or other tool w itha small point on one end. Switches are two-position, up indicating“on” or a value of “1” an d dow n indicating “off ” or a va lue of “0”.

h. After ad justing the DIP sw itches, reassemble the receiver by re-peat ing steps a th rough e in the reverse order, w hile obse rving thefollowing:

(1) When returning the electronic assembly to t he h ousing, the LEDsand displays must line up w ith t he m odule enclosure w indows.

(2) The b otto m pa nel must be installed w ith the plast ic clip at thetop of t he receiver module.


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BELOW

SETPOINT

ACTIVATEALARMS WARNING SETPOINT- %OF RANGE

BANK A

ABOVESETPOINT

1 2

1

ON

1 1 1 1 1 1

0 0 0 0 0 0 0

3 4 5 6 7 8

10SECONDS

ALARMDELAY ALARM SETPOINT- %OF RANGE

BANK B

2SECONDS

1 2

1

ON

1 1 1 1 1 1

0 0 0 0 0 0 0

3 4 5 6 7 8

DISPLAY RANGE

BANK C

1 2

1

ON

1 1 HORN1 ALARM LATCHING NORMALENERG.

00 0 0ALARM

ORWARNING

WARNING NON-LATCHING

NORMALDE-ENERG.

3 4 5 6 7 8

RELAY 3

BANK D

1 2

HIGH

ON

ALARM LATCHINGON ALARM LATCHING NORMALENERG.

NORMALENERG.

NORMALOFF WARNING NON-LATCHING

WARNING NON-LATCHING

NORMALDE-ENERG.

NORMALDE-ENERG.

3 4 5 6 7 8

RELAY 2RELAY 1DISPLAYINTENSITY

AUTOTEST

Shows Factory Settings

Figure 3.3 - Receiver Dip Switch Functions


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For instance, if you have a receiver rang e of 0 to 10 ppm a nd w ant toad just a setpo int for 3 ppm, set t he a ppropriate DIP switches to t he bina rynum ber fo r 30%from th e SETPOINTSELECTION ta ble, be low .

Setpoint Selection% Switch Pos. % Switch Pos. % Switch Pos.5 0000101 37 0100101 69 10001016 0000110 38 0100110 70 10001107 0000111 39 0100111 71 10001118 0001000 40 0101000 72 10010009 0001001 41 0101001 73 1001001

10 0001010 42 0101010 74 100101011 0001011 43 0101011 75 100101112 0001100 44 0101100 76 1001100

13 0001101 45 0101101 77 100110114 0001110 46 0101110 78 100111015 0001111 47 0101111 79 100111116 0010000 48 0110000 80 101000017 0010001 49 0110001 81 101000118 0010010 50 0110010 82 101001019 0010011 51 0110011 83 101001120 0010100 52 0110100 84 101010021 0010101 53 0110101 85 1010101

22 0010110 54 0110110 86 101011023 0010111 55 0110111 87 101011124 0011000 56 0111000 88 101100025 0011001 57 0111001 89 101100126 0011010 58 0111010 90 101101027 0011011 59 0111011 91 101101128 0011100 60 0111100 92 101110029 0011101 61 0111101 93 101110130 0011110 62 0111110 94 101111031 0011111 63 0111111 95 101111132 0100000 64 1000000 96 110000033 0100001 65 1000001 97 110000134 0100010 66 1000010 98 110001035 0100011 67 1000011 99 110001136 0100100 68 1000100 100 1100100


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The Ga s Detector is factory set to alarm w hen ga s concentrations a bovethe chosen setpoints are exceeded; however, if switch A1 is set to theON position, alarms will be initiated when gas concentration is belowthe setpoint.

3.2.4 Relay Configuration

• FACTORY CONFIGURATION OF RELAYS —

* Relay 1 – Conf igured to trip ab ove the Warning setpoint and setfor norma lly energized, non -latching opera tion.

* Relay 2 – Conf igured to trip ab ove the Alarm setpoint and set fornormally energized, latching operation.

* Relay 3 – Conf igured to trip ab ove the Alarm setpoint and set fornormally energized, latching operation, not for horn operation.

* Alarm Delay – Configured for tw o-second delay.

• WARNING OR ALARM — Each relay can be assigned to either theWarning or Alarm setpoint . As show n in t he DIP SWITCH FUNCTIONScha rt, sw itches D3, D6, and C6 configure ea ch relay. When Warning isselected, the relay w ill act ivate w hen t he Warning lamp on the f rontpane l lights. When Alarm is selected, the relay w ill activate w ith theAlarm lam p on t he front pane l.

• NORMALLY ENERGIZED/DE-ENERGIZED — Relays one throug h th reeare fa ctory set to t he n orma lly ene rgized mod e, providing “Fail-Safe”operat ion. This mean s the relays are energized in a n orma l cond itionand w ill de-energize fo r a Warn ing o r Alarm con dition, o r if pow er islost to the system. However, operation in this mode will reduce theperiod of operat ion on Battery Back-up. The relays ma y be set to thenormally de-energized mode by setting switches C8, D5, and D8 tothe o ff position. To avoid batt ery drain and internal hea t ge nerat ion,unused relays should be set to Normally De-Energized.

• LATCHING OR NON-LATCHING — Relays may be either Latchingor Non-latching. A latching relay activates when gas concentrationexceeds the setpoint, b ut w ill only de-activate w hen t he push-butto non t he front o f the receiver is pressed af ter the ga s concentration hasfa llen be low the set point. A non -latching relay w ill automa tically de-

activate w hen th e ga s concentration falls below t he setpoint. Selec-tion o f th e latch/non -latch fun ction uses sw itches D4, D7, and C7.

• EXTERNAL HORN RELAY — Relay 3 provides an a dditiona l configura -tion o ption not available on relays 1 or 2. Sw itch C5 allow s Relay 3 tobe con figured for use in a ctivat ing a n external audible horn. Whensw itch C5 is on, a ny external horn t ied to Relay 3 w ill sound intermit-tently wh en the w arning setpoint is exceeded a nd w ill go to steady-onw hen the a larm setpoint is exceeded . The relay w ill de-activate w hen


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the push-button sw itch is pressed or w hen t he remote reset terminalsare connected, silencing the external horn.

3.2.5 Alarm Delay

A time delay precedes the activation of alarm relays to eliminate falsealarms due to electrical transients. The de lay is facto ry set to tw o secon ds,but can be cha nged to 10 seconds w ith sw itch B1. The delay time affectsboth the a larm indicator lamps and the associated relays.

3.2.6 Display Intensity (Monitor Units Only)

The LED numeric display is facto ry set in the no rmal inte nsity mo de,an d can b e set for high intensity by the user; how ever, to avoid internalheat ing, and battery drain, it is recomme nded th at the d isplay remainat norma l inten sity. Switch D2 is used to select no rmal or high intensity

display mode .

3.2.7 Auto-Test Enable

The receiver modu le is shipped f rom the f actory w ith th e Auto -Test o p-tion disabled. If the Autotest G as Ge nerato r (optiona l) is insta lled o n th esystem, the receiver module cover must be removed a nd t he autotestsw itch (D1) must be m oved to th e “on” position.

NOTE: The Auto-Test option is for indoor use only, and should onlybe used with detectors set to the standard range or lower, as listed

in Section 1.1 – Technical Data. If used with higher ranges, the gen-erator may not produce enough gas to test the sensor.

3.3 Receiver Module Startup

Rece iver front pa ne ls con ta in three LED ba rs wh ich ind icate Warn ing,Alarm, an d Sen sor Trouble co ndition s. A fourt h, gree n b ar LED is markedwith the type of gas which the receiver operates with. Monitor typereceivers have a four digit nume ric LED display w hich indicate s g as co n-centra tion in ppm.

When pow er is first applied, a ll ala rm funct ions w ill be inh ibited for fiveminutes w hile th e system is allow ed to sta bilize. This is indicat ed byWarning an d Alarm lam ps flashing in an alternat ing pat tern. Monitorsw ill display t he Full Scale Ran ge setting for three se conds, the n t he Warn-ing Setpoint for three secon ds, follow ed by th e Alarm Setpoint fo r threesecond s. The d isplay w ill then indicate the detected ga s level, w hich w illappea r to be high un til the sen sor stabilizes.


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NOTE: It is strongly recommended that sensors be powered overnightupon initial startup before adjustments are made and before con-nections are made to alarm relays. Sensors which are powered forthe first time may remain in an alarm state beyond the five minuteinhibit period and may take several hours to fully stabilize.

3.3.1 Alarm Acknowledge and Reset

The front pane l of the Receiver conta ins one push-butto n, ma rked Ac-cept/Reset, w hich is used for a numb er of different f unctions. When theReceiver is in normal operation, a gas leak that exceeds the warningsetpoint w ill cause t he Warning indicato r to flash a nd t he interna l hornto sound intermittently. If the alarm setpoint is exceeded, the Alarmindicato r will flash a nd th e horn w ill sound ste ad ily. Pressing t he but tonthe f irst time w ill silence t he a udible ho rn, an d w ill cha ng e the Warningan d Alarm indicat ors from f lash to stea dy-on . The Warning ind icato r will

automa tically shut off w hen g as concentration falls below the setpoint,but the Alarm indicato r will remain on. Pressing t he butt on a fter the g asha s cleared w ill reset the Alarm indicator.

Operation of th e alarm relays depends on the con figuration selected foreach one (see pa ragraph 3.2.1, Configuration Sw itches).

3.3.2 Sensor Trouble Alarm and Relays

Receivers con ta in a Trouble Relay w hich is associate d w ith th e Sen sorTrouble ind icato r. A Sensor Trouble Alarm w ill be activate d if the trans-mitter input is disconnected or shorted or if the Detector fails to passan a uto-test. If these co ndition s occur, the Senso r Trouble indicato rw ill light , th e ho rn w ill sound inte rmitten tly, and the Trouble Relay w illchan ge sta te. Note t ha t t he Trouble Relay is a f ail-safe relay. Under no rmalconditions, th e coil of th is relay is energized, an d it de-energizes w hen aSenso r Trouble Alarm o ccurs or if pow er fa ils. Afte r the troub le cond itionclea rs, press the push-butto n or close th e remote reset cont acts to resetth e Senso r Troub le Alarm.

3.3.3 Auto-Test Function

NOTE: The Auto-Test option is for indoor use only, and should only

be used with detectors set to the standard range or lower, as listedin Section 1.1 – Technical Data. If used with higher ranges, the gen-erator may not produce enough gas to test the sensor.

The o ptiona l Auto -Test f ea ture verifies the proper opera tion o f gas dete c-tion systems autom atically. It is ena bled w hen configuration sw itch D1is in the “on ” position . Auto -Test uses an e lectroche mical Ga s Gene rato rattached to the gas sensor and controlled from the receiver. Every 24


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hours, the microcomputer in the receiver activates the Gas Generatorand m onitors the output of the g as sensor.

During the time w hen a n Auto -Test is in prog ress, the a larm relays areinhibited. This is indicate d by t he w arning an d a larm indicato rs alternately

flashing. Typically, a n a uto-test w ill last only a few second s. After co mple-tion of the test the a larm response w ill be delayed to allow ga s to clearfrom th e sen sor/ge nerat or a nd fo r the sensor to recover. The system w illbe fully inhibited for two minutes, followed by an eight minute periodduring w hich the detecto r w ill respond o nly to gas levels of g reater tha n50%of full scale.

When the Auto-Test is a ctivated, the ge nerato r w ill turn on for a ma ximumof five minutes. If no sensor response is detected during this time, thegenerator will turn off and the receiver will wait for 15 minutes beforeinitia ting an oth er Auto -Test . If it fa ils th is secon d te st, a Senso r TroubleAlarm w ill be initiat ed, as described ea rlier. The Receiver w ill auto -testtw o m ore times a t on e hour intervals. If the sensor passes either of th esetest s, t he Senso r Trouble Alarm w ill reset.

3.3.4 Lamp and Horn Test

When the Receiver is in t he norma l mode, pressing the push-button an dholding it for tw o seco nds w ill illuminate all digita l display seg men tsan d LED indicator ba rs, and w ill sound th e internal ho rn. Upon relea singthe button , th e receiver w ill return to its previous sta te.

3.3.5 Relay Inhibit

Alarm relays in t he Receiver can be inhibited for up to four ho urs to a llowcalibration or te sting of Sensor/Transmitters w ithout act ivat ing externalalarm o r control devices.

To initiate the inhibit mod e, w ith the Receiver in the n orma l mode, pressan d ho ld the push-butto n for a pproxima tely five seco nds. The lam p testw ill occur first, but continue to hold the butto n dow n. Once the lamps haveshut off, release the button. The w arning and alarm lamps w ill begin toflash a lterna tely for a few second s. If th e Auto-Test co nfigurat ion sw itch isin the “on” position a nd th e push-butto n is not pressed, the Sen sor trouble

lamp w ill fla sh a fte r the Alarm/Warn ing lam ps have sto pped fla shing . Ifno a ction is taken, t he Receiver w ill return to t he n orma l mode.

If the push-butto n is pressed an d released w hile the w arning a nd a larmlamps are in alternat ing flash, the Receiver w ill go into the relay inhibitmod e. The w arning a nd a larm lam ps will cont inue their alternat ing rapidflash, a nd the Receiver will rema in in inhibit for four hours or until thebutto n is pressed a ga in. During th is period, the display w ill indicate ga sconcen tration, a nd th e 4-20 mA output w ill be held at the level it wa s at


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ha s clea red. The remo te reset input w ill not act ivat e an y of th e testingor inhibit fun ctions of the receiver.

3.3.8 Analog Output

Monitor Receivers provide a n isolate d 4-20 mA out put sign al for interfa cew ith recorders, da ta logg ers, or computer systems. The span of t he 4-20mA signal is the same as the range of the receiver selected during thereceiver configuration. The o utput w ill drive load s of 0 to 1000 o hms.

3.4 Sensor/Transmitter Operation

Gas sensors are a tta ched directly to transmitter boxes with a w ater-tightseal. A short sensor ca ble plugs into th e t ransmitter circuit boa rd. Theoptiona l Gas Generator is atta ched to the sensor and connects to a ter-minal block on th e circuit bo ard.

The Rece iver provides pow er to the Sen sor/Transmitte r throug h a tw o-conductor cable, w hich is also used to transmit the signa l back to th eRece iver. The Sen sor/Transmitte r may n ot b e used w ith a sepa rate pow ersource.

3.4.1 Sensor Installation (See Dwg. 50.130.150.001)

Sensor/Transmitters m ust be moun ted w ith th e se nsor ho rizont al.

NOTE: Gas sensors are shipped with a protective red plastic cap over

the end. This cap should be left in place to avoid damage to the sen-sor physically or from chemical vapors, until ready for service. Thiscap must be removed when the sensor is placed in service.

Installation wiring requires connection of a two-conductor cable fromthe receiver to TB1 as show n. This conn ect ion is not po larity sensitive;either conductor can be connected to either terminal.

The Autotest Ge nera to r is connected to TB2. Polarity must be o bservedas show n.

NOTE: The Auto-Test option is for indoor use only, and should onlybe used with detectors set to the standard range or lower, as listedin Section 1.1 – Technical Data. If used with higher ranges, the Gen-erator may not produce enough gas to test the sensor.

It is recommend ed th at w hen first installed, a sensor should be connectedto a Receiver and allowe d to sta bilize fo r approximately 12 h ours. Thesensor should th en be zeroed a s described in Section 4 – Service.


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GAS DETECTOR SYSTEM - ASSEMBLY

50.130.160.001ISSUE 1 8-08

s


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SECTION 4 – SERVICE

List Of Contents

PARA./DWG. NO.

Removing Unit from Service ............... .................. ... 4.1Sensor Service ............... ................. .................. ...... 4.2 General Sensor Response Test ............... ............... 4.2.1 Chlorine Sensor Response Test .... ..... .... ..... .... ..... .. 4.2.2 Sulfur Dioxide Sensor Response Test ..... ..... .... ..... .. 4.2.3 Amm onia Sensor Response Test ..... .... ..... ..... .... .... 4.2.4Sensor Replacemen t .................. ................. ............ 4.3Gas Generator Replacemen t ............... ................. .... 4.4Sensor Calibration ........................... ................. ...... 4.5 Zero Adjustment ............... .................. ................. 4.5.1

Transmitter Span... ................. ................. ............. 4.5.2 Rang e Adjustment ................. .................. ............ 4.5.3Battery Replacemen t .................. ................. ............ 4.6Rout ine Service ... . . . . . .. . . . . . . . .. . . . . . . . .. . . . . . . . .. . . . . . . . .. . . . . . . . . . 4.7Troubleshooting ............ ................. .................. ...... 4.8Warning/Caution Summa ry Pag e ........................... .. 1 PageIllustrations Service – Sensor/Transmitter ..... .... ..... ..... .... ..... .... 50.130.150.001


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4.1 Removing Unit From Service

The low -volta ge drop-out relay o n th e Bat tery Back-up unit is energizedas soo n as pow er is applied to the pow er supply module. Once energized,the coil current is supplied from the power supply module initially, but

will be supplied from the battery if power is removed from the powersupply mod ule, or if the m odule is disconnecte d from the ba ttery. If thega s detection system supported by t he Bat tery Back-up is sta rted up fortesting and then shut down, the Battery Back-up relay should be de-energized manually; otherwise, the relay coil will continue to drain theba ttery un til the 10 volt level is reached . This w ill shorten the life o f th ebattery, and the b attery w ill be discharged w hen the d etection systemis started up a ga in.

To de-energ ize t he relay, slide the cont rol circuit boa rd of f t he ba tteryterminals until the relay co il drops out (the re w ill be a click), an d th enslide it back on. As soon as the battery connection is broken, the relaycoil will drop out, and will not energize until power is again applied tothe pow er supply mo dule. This procedure is recom men ded any time th edetection system is removed from service.

4.2 Sensor Service

4.2.1 General Sensor Response Test

Gas sensors sho uld be che cked reg ularly for proper response. For systemsnot eq uipped w ith Auto-Test, a t least mon thly ma nua l sensor responsetesting is recommen ded.

The sensor response te st de scribed below should a lso be used if the Auto-Test system detects a sensing f ailure a nd lights th e Sensor trouble lamp.If the sensor responds to manually applied gas but not to the AutotestGenerator, replace the generator.

The sensor response test w ill activate a larm relays unless th ey a re inhib-ited as described in paragraph 3.3.5, Relay Inhibit. Sensor response tothe te st ga s may be o bserved by: view ing the digital display o n MonitorReceivers, by mon itoring the volta ge a t the test points in the tran smitter,by viewing the Warning an d Alarm ligh ts o n t he Receiver, o r by obse rving

the o peration o f a larm relays in the receiver.

4.2.2 Chlorine Sensor Response Test

A high concentration o f chlorine g as ca n be obta ined from pow deredca lcium hypoch lorite (HTH) ava ilable from an y sw imming poo l supply.Place a teaspoon of calcium hypochlorite into a plastic bottle and keepthe bottle capped until ready to test the sensor. Open the bottle andplace t he m outh n ear the sensor. After the sensor response has been


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verified, immediately remove the bottle as prolonged exposure to highconcentrations of chlorine will shorten the life of the sensor. If no re-sponse is observed, the sensor may need to be replaced. See paragraph4.8, Troublesho ot ing.

4.2.3 Sulfur Dioxide Sensor Response Test

Sulfur Dioxide sensors can b e teste d w ith fresh pow dered sod ium bisulfiteplaced in a squeeze bottle. A vapor of a few ppm can be sq ueezed tow ardthe sensor. If the sensor does not respond, it may need to be replaced.See pa ragra ph 4. 8, Troublesho oting.

NOTE: If the sodium bisulfite is not fresh, it may not produce a highenough concentration to test the sensor.

4.2.4 Ammonia Sensor Response Test

Ammonia sensors can be tested using ordinary ammonia solution usedfor clean ing. Open a bottle of a mmon ia solution and carefully move themouth of th e bott le nea r the sensor. Do not splash liquid amm onia solu-tion on the sensor or it could dama ge t he sensor. When th e mouth of thebott le is approximately one inch from the sensor, a rapid response shouldbe observed. Immediately remove the ammonia bottle as prolongedexposure to high concentrations of a mmon ia w ill shorten th e life of thesensor. If the sensor does not respond it may need to be replaced. Seeparag raph 4.8, Troubleshooting .

4.3 Sensor Replacement (See Dwg. 50.130.150.001)Open t he Transmitter a nd unplug th e Sensor cab le from the transm it-ter circuit board. Unscrew the Sensor from the nut on the inside of theenclosure and screw in the replacem ent Sen sor.

Connect the new Sensor to th e pins on the transmitter board and replacethe Transmitter cover. After a new Sensor ha s been conn ected, allow 12hours for the new Sensor to co mpletely sta bilize. Then perform zero an dspan a djustmen ts as described in this section.

WARNING: THE GENERAL SENSOR RESPONSE TEST, AS DESCRIBEDABOVE, MUST BE PERFORMED WHENEVER A NEW SENSOR IS IN-STALLED.

NOTE: It is strongly recommended that sensors be powered over-night upon initial startup before adjustments are made and beforeconnections are made to alarm relays. Sensors that are powered forthe first time may remain in an alarm state beyond the five-minuteinhibit period and may take several hours to fully stabilize.

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4.4 Gas Generator Replacement (See Dwg. 50.130.150.001)

To replace , disconn ect th e Gen erato r lea ds from th e termina l block ma rkedTB2. Loo sen th e ca ble gland , pull the w ires out of t he e nclosure, a ndunscrew the Generator from the sensor. Reverse the process to install

the n ew Generator. Observe the w iring polarity w hen installing the newGenerator.

Once insta lled, th e new Generat or should be tested by running the Manua lAuto -Test procedure described in paragra ph 3.3. 6. If no sen sor responseis observed, recheck the Gene rator conn ection to be sure the polarity iscorrect a nd t ha t sw itch D1 in th e Receiver Module is in th e “on” position.If the sen sor still doe s not respond, test th e sensor w ith the a ppropriateSensor Response Test d escribed in parag raph 4.2. If th e sen sor doe s notrespond, replace it. If the sensor responds properly, contact SiemensWate r Techno logies for a ssista nce w ith th e G enera tor.

4.5 Sensor Calibration (See Dwg. 50.130.150.001)

The zero may drift w ith temperature, an d it is recom men ded th at t hesensor zero be adjusted upon initial installation and every month after.At minimum, sea sona l ad justmen ts should be mad e to avoid false alarmsdue to zero drift.

For applications where precise indication of gas level is required, Sen-sor/Transmitte rs should be spa nn ed every th ree to six mo nths. The b estca libra tion so urces are generally 10%accurate, a nd a Senso r/Transmitte rw ill normally chang e sen sitivity by less th an 25%over 12-mon ths t ime. Ifon-site calibrat ion is not practical, it is recomme nded t ha t a ne w, f acto ryca libra ted Senso r/Transmitte r be purchase d every tw o yea rs.

NOTE: It is essential that the transmitter zero and span adjustmentsbe re-calibrated whenever sensors or transmitter circuit boards arereplaced independently.

Calibra tion of the Senso r/Transmitte r requ ires a digita l volt m ete r (DVM),a source of ca libration ga s and a calibration ada pter for the sensor.

For CHLORINE, e lectroche mical g enera tors a re typica lly used fo r ca libra -

tion gas. SULFUR DIOXIDE gas can be obtained in disposable cylindersfrom specialty gas suppliers. AMMONIA calibration gas can be obtainedin refillable high pressure cylinders from specialty g as suppliers. For mo reinformation o n calibration g as eq uipmen t, cont act yo ur Sieme ns Wate rTechn olog ies equipment distributor.

Proper tubing should be used to con nect g as sources to sensors, particu-larly chlorine. Polyethylene t ubing is recomme nded for all gase s.


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Prior to ca librat ion, rem ove th e cover from th e Sensor/Transmitte r enclo-sure a nd co nne ct a DVM to the test po ints as sho w n in Figure 4.1. Thetest points w ill provide a 0-1.00 Vdc signa l proportiona l to t ransmitterrang e. For example, a rang e of 0 to 10 ppm, 0 ppm is 0.00 volts and 10. 0ppm is 1.00 volts.

Figure 4.1 - Sensor/Transmitter Enclosure

NOTE: If alarm relays at the receiver are connected to devices thatshould not be activated during calibration, place the receiver into“alarm inhibit” as described in paragraph 3.3.5, Relay Inhibit, priorto calibrating the Sensor/Transmitter.

4.5.1 Zero Adjustment (See Dwg. 50.130.150.001)

Before adjusting t he zero, a llow the se nsor to fully sta bilize by leaving iton for approximately 12 ho urs. Ambient air must be “clea n”.

The zero ca n be ad justed w ith just a DVM. Conn ect th e mete r to the testpoints, and adjust the zero potentiometer until a stable value of 0.00volts is obta ined.

4.5.2 Transmitter Span (See Dwg. 50.130.150.001)

Before adjusting the span, the sensor must be fully stabilized and thezero adjusted. See pa ragra ph 4.5.1, Zero Adjustme nt.

If a Senso r/Transmitte r is eq uipped w ith a n Autot est G ene rato r, it mustfirst be unscrewe d from the sensor. The Calibrat ion Ada pter can t hen beatta ched to the sensor.

The ca libration g as is conn ected to t he ca libration a da pter w ith an a p-propriate t ube. When used , ga s gen erato rs must be a llow ed to sta bilizeacco rding to th e ma nufa cturer’s directions. Calibration g as is applied atapproximately 500 cc/min an d should be a llow ed to flow to th e senso rfor 10 minutes before ad justing the spa n.


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Connect the DVM to the transmitter test points. Adjust the span po-tentiometer until a stab le voltage reading is obtained according to th efollowing eq uation:

V = Span Ga s Conce ntrat ion ÷ Transmitter Ran ge

As an exam ple, if the ca libra tion g as is 3 ppm a nd t he Senso r/Transmitte rrange is 0 to 5 ppm, the voltage should be a djusted to 3 ÷ 5 = 0.6V.

If th e receiver w as placed in the “inhibit” mod e prior to calibration, pressthe pushbutton sw itch on the receiver to return t he system to normaloperation.

4.5.3 Range Adjustment (See Dwg. 50.130.150.001)

Sensor/Transm itters are fa ctory ca librate d a t th e Stan da rd Ra ng es a s

listed in Section 1.1 – Technical Data , but ca n be ch an ge d w ithin th elimits listed in tha t Section.

The rang e can b e chang ed by first setting the rang e configurationsw itches, C1 to C4, in the Receiver Module a s described in pa ragra ph 3.2,Receiver Module Operation. The transm itter span must then be ad justedas described above.

4.6 Battery Replacement (See Dwg. 50.130.000.003)

WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY OREQUIPMENT DAMAGE, HANDLE BATTERIES WITH CARE, BEINGCERTAIN NOT TO SHORT TERMINALS, AS SEVERE ARCING OREXPLOSION COULD OCCUR.

Remo ve the ba ttery e nclosure cover. Pull the plug of f th e circuit bo ard.Cut the stra p holding t he ba ttery in place , then pull the ba ttery out. Slidecircuit boa rd off ba ttery terminals.

To insta ll the new ba ttery, reverse a bove procedure. A new strap is sup-plied w ith replacemen t ba tteries. The ba ttery sho uld be insta lled w iththe te rmina ls to the rea r of the enclosure.

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4.7 Routine Service

WARNING: TO AVOID POSSIBLE SEVERE PERSONAL INJURY OR EQUIP-MENT DAMAGE, DUE TO UNDETECTED LEAKS OF DANGEROUS GAS,THE FOLLOWING SERVICE MUST BE PERFORMED TO VERIFY OPERA-TION OF THIS GAS DETECTOR.

• MONTHLY

a. Test sensor response w ith actual gas if Autotest Gene rator is notinstalled. However, if a higher degree of confidence is desired,the sensor may be tested more often.

b. Adjust sensor zero potent iometer.

c. Clean batte ry vent.

d. Verify tha t the Batte ry Back-up wo rks by removing a c powe r.

• QUARTERLY

Adjust th e sen sor span potent iometer (optiona l—requires a ga s cali-bra tion device). (Not supplied by Sieme ns Water Techn olog ies.)

NOTE: Span adjustment is recommended only when a precise indica-tion of gas level is required.

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WARNING LABELS AND TAGS

The follow ing w arning labels and tag s are atta ched to th e eq uipment.

----------------------------------------------------------------------------------------------------

P60391: Gases detected are haza rdous substances, and if breathedin high con centra tions can cause de at h. To ma intain norma loperation o f this detector you must observe the follow ingprecautions.1. DETECTOR OPERATION MUSTBE CHECKED AND VERIFIED

FREQUENTLY ON A REGULAR SCHEDULE.2. To avoid injury from electrical sho ck, turn pow er sources

off b efore servicing this equipment.3. The Siemens Water Techn olog ies inst ruction bo ok pro-

vided w ith t his detecto r DETAILS insta lla tion , o perat ionand ma intenance.

4. Operation AND ma intena nce of this eq uipmen t mustbe restricted to trained, qualified personnel who arecompletely familiar with t hese instructions.

----------------------------------------------------------------------------------------------------P60402: PERSONAL INJURY OR DEATH MAY RESULTFROM EXPOSURE

TO THE DESIGNATED GAS. TEST ASSEMBLY WITH DESIG-NATED GAS UPON START-UP, MONTHLY, AND IF EXPOSED TOCHEMICALS. REPLACE OR REPAIR ASSEMBLY IMMEDIATELYUPON TESTFAILURE. REFER TO THE SIEMENS WATER TECH-NOLOGIES MANUAL.

----------------------------------------------------------------------------------------------------P60392: * TO AVOID INJURY FROM ELECTRICAL ARCING , TURN

POWER SOURCES OFF BEFORE SERVICING THIS EQUIP-MENT.

----------------------------------------------------------------------------------------------------

CAUTION LABEL

The follow ing caut ion lab el is att ache d to the e quipment .----------------------------------------------------------------------------------------------------P60392: *LEAD ACID BATTERY, DISPOSE OF PROPERLY.----------------------------------------------------------------------------------------------------* Both on sa me label.


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SENSOR/TRANSMITTER - SERVICE

50.130.150.001ISSUE 0 11-93


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GAS DETECTOR SYSTEM - PARTS

50.130.000.001AISSUE 1 8-08

NOTE: MONITOR UNITS SHOWN.


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U29335 - CHLORINE; U29337 - SULFUR DIOXIDE; U29336 - AMMONIASENSOR/TRANSMITTER UNIT - PARTS

50.130.000.002ISSUE 0 11-93


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U29319 BATTERY BACK-UP - PARTS

50.130.000.003ISSUE 0 11-93


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SECTION 6 – SPARE PARTS LIST

QTY DESCRIPTION PART NO.

1 Calibra tion Ada pter P 60394

1 Batte ry U 29314

1 Chlorine Senso r (Cl 2) U 29329

1 Sulfur Dioxide Senso r (SO 2) U 29331

1 Amm onia Sensor (NH 3) U 29330

1 Chlorine Gene rator (Cl 2) U 29326

1 Sulfur Dioxide Gen era tor (SO 2) U 29328

1 Ammo nia Generato r (NH 3) U 29327

Specify Feet Transmitter Cable P 40231

Documents

Acutec 35 Gas Detection